Basic websocket with Spring without STOMP and SockJS

Question

I have implemented the following websocket endpoint

@MessageMapping("/socket/{myId}/") @SendTo("/queue/myqueue") public MyObject getObject(@DestinationVariable String myId) throws Exception { return new MyObject("MyId:" + myId); }

Now how can I send message to that endpoint from one of my service.java class? There will be front-end client as well, which will read the message from websocket once the service.java class's method send some message to websocket endpoint. I am a little confused that how can I do that?

Any help would be appreciated

Dhiraj Ray · Accepted Answer · 2017-02-12 12:01:45Z

When using a raw websocket(without STOMP), the message sent lacks of information to make Spring route it to a specific message handler method (we don't have any messaging protocol), so instead of annotating your controller, you'll have to implement a WebSocketHandler by extending TextWebSocketHandler public void handleTextMessage(WebSocketSession session, TextMessage message){ }

Checkout an example here spring boot websocket without STOMP and SockJs

Tolledo · Accepted Answer · 2017-01-14 19:46:21Z

You should take a look at SimpMessagingTemplate. For example, if you want to send a message for a specific user from your service class:

@Autowired private SimpMessagingTemplate messagingTemplate; public void sendMessage(User user, String message) { Objects.requireNonNull(user); Objects.requireNonNull(message); messagingTemplate.convertAndSendToUser(user.getUsername(), "/queue/myqueue", message); }

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